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我々はいかにして安全な
名前解決を手に入れるか / How do we get secure ...

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Avatar for Kazunori Jo Kazunori Jo
August 18, 2018
Technology
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我々はいかにして安全な
名前解決を手に入れるか / How do we get secure name resolution

Kyoto.なんか #4

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Kazunori Jo

August 18, 2018
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Transcript

  1. զʑ͸͍͔ʹͯ҆͠શͳ
 ໊લղܾΛखʹೖΕΔ͔ itochan Kyoto.* #4

  2. ͩΕ •౦ژͷେֶੜ •͸ͯͳΠϯλʔϯ 2016 ߦͬͯ·ͤΜ JUPDIBO !JDIBO

  3. എܠ • ੈؒͰ͸HTTPSԽͷѹ͕ߴ·͍ͬͯΔ • ໊͔͠͠લղܾ͸ฏจ • DNSͷ௨৴ܦ࿏Λ҉߸Խ͍ͨ͠ʂʂʂ • ҆શҙࣝͷߴ·Γ

  4. ͦ͜Ͱɺ

  5. DNS over HTTPS (DoH) • HTTPSܦ༝Ͱ໊લղܾ͕Ͱ͖Δ • IETF Draftʹͳ͍ͬͯͯඪ४Խ։࢝ •

    ࣮͸DNS over TLSͱ͍͏ͷ΋͋Δ • RFCͰඪ४Խ͞Ε͍ͯΔ (RFC 7858)

  6. ✔ ྑ͍ͱ͜Ζ • ໊લղܾ΋ؚΊ௨৴Λ׬શʹ҉߸Խ͢Δ͜ͱ͕Մೳʂ • େֶͷճઢͰ΋҆৺͍ͯ͠ΖΜͳαΠτΛӾཡͰ͖Δ

  7. ✘ ѱ͍ͱ͜Ζ • ໊લղܾʹएׯΦʔόʔϔου͕͋ΔʢͱݴΘΕ͍ͯΔʣ • TLS1.3Ͱղܾ͢Δ͔ʁ • ѱ͞Λ͍ͯ͠ΔͱࢥΘΕΔ

  8. DNS over HTTPS ࢖͏ʹ͸ • ࢖͑ͦ͏ͳͱ͜Ζ͸2ͭ • Google Public DNS:

    8.8.8.8, 8.8.4.4 • Cloudflare DNS: 1.1.1.1, 1.0.0.1

  9. DNS over HTTPS ࢖͏ʹ͸ • ࣍ͷFirefoxͰ͸CloudflareʹΑΔ
 DoHͷ໰͍߹ΘͤΛαϙʔτ͢ΔΒ͍͠ • Android PͰ͸OSͰαϙʔτ͢ΔΒ͍͠

    • ϩʔΧϧʹΫϥΠΞϯτΛཱͯlocalhost:53 ʹ໰͍߹Θͤ

  10. DNS over HTTPS ࢖͏ʹ͸ • ࣍ͷFirefoxͰ͸CloudflareʹΑΔ
 DoHͷ໰͍߹ΘͤΛαϙʔτ͢ΔΒ͍͠ • Android PͰ͸OSͰαϙʔτ͢ΔΒ͍͠

    • ϩʔΧϧʹΫϥΠΞϯτΛཱͯlocalhost:53 ʹ໰͍߹Θͤ ˣ͜Ε࠷ߴ

  11. DNS over HTTPS ΫϥΠΞϯτ • Ͳ͔ͬͪೖΕΔ • stubby • cloudflared

    ←؆୯

  12. ΍͍͖ͬͯ·͠ΐ͏

  13. ͜Μͳײ͡

  14. IUUQTUSBOTQBSFODZSFQPSUHPPHMFDPNIUUQTPWFSWJFX